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A035132
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Squareful (i.e. not squarefree) palindromes.
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4
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4, 8, 9, 44, 88, 99, 121, 171, 212, 232, 242, 252, 272, 292, 333, 343, 363, 404, 414, 424, 444, 464, 484, 525, 575, 585, 616, 636, 656, 666, 676, 686, 696, 747, 808, 828, 848, 868, 888, 909, 999, 1331, 1881, 2112, 2332, 2552, 2662, 2772, 2992, 3663, 3773
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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LINKS
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Table of n, a(n) for n=1..51.
Eric Weisstein's World of Mathematics, Squarefree
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EXAMPLE
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E.g. 4114 = 2 * 11^2 * 17.
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MATHEMATICA
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sfQ[n_]:=Max[Transpose[FactorInteger[n]][[2]]]>1; palQ[n_]:=FromDigits[Reverse[IntegerDigits[n]]]==n; Select[Range[2, 3776], sfQ[#] && palQ[#] &] (* Jayanta Basu, May 12 2013 *)
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CROSSREFS
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Cf. A005117, A013929, A035133.
Sequence in context: A115656 A076705 A162752 * A077572 A083807 A098128
Adjacent sequences: A035129 A035130 A035131 * A035133 A035134 A035135
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KEYWORD
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nonn,base,changed
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AUTHOR
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Patrick De Geest, Nov 15 1998.
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STATUS
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approved
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